Usually, there is no need to store these elements in oil, unlike the group one elements. The atomic number of each element increases by one, reading from left to right. Oxygen is a member of the chalcogen group on the periodic table and is a highly reactive nonmetallic element. The elements in Group 2 on the Periodic Table can be compared in terms of first ionization energy, electronegativity, and other general properties. 1 The amounts of TDS and chloride should be increased by the concentrations of these constituents in the carriage water.. 2 BOD 5 is the biochemical oxygen demand at 20°C over 5 days and is a measure of the biodegradable organic matter in the wastewater.. That means; these elements have their outermost electrons in the s orbital. Chemical Properties of Oxygen. At standard temperature and pressure (STP), two atoms of the element bind to form dioxygen, a colorless, odorless, tasteless diatomic gas with the formula O 2. (3) Both group 1 and group 2 elements produce white ionic compounds. You'll find more specific groups, like transition metals, rare earths, alkali metals, alkaline earth, halogens, and noble gasses. The key difference between group 1 and group 2 elements is that all group 1 elements have unpaired electrons in their outermost orbital, whereas group 2 elements have paired electrons in their outermost orbital.. Groups 1 and 2 of the periodic table contain s block elements. These solids have 1)Group 2 2)Group 6 3)Group 15 4)Group 17 25)Which group contains elements in three phases of matter at STP? Members of a group typically have similar properties and electron configurations in their outer shell. The alkaline earth metals are six chemical elements in group 2 of the periodic table.They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). Which properties are characteristic of Group 2 elements at STP? The STP process has 3 elements to realize the segmentation. The elements become increasingly electropositive on descending the Group. The Group 2 elements are all metals with a shiny, silvery-white colour. A) poor electrical conductivity and electronegativities greater than 1.7 0) good electrical conductivity and electronegativities less than 1.7 1)11 2)17 3)12 4)18 26)Which group in the Periodic Table contains elements that are all gases at STP? This page explores the trends in some atomic and physical properties of the Group 2 elements - beryllium, magnesium, calcium, strontium and barium. Key O = atom of oxygen = atom of hydrogen = atom of chlorine 28. Included in the group two elements are Beryllium(Be), Magnesium(Mg), Calcium(Ca), Strontium(Sr), and Barium(Ba). There are multiple ways of grouping the elements, but they are commonly divided into metals, semimetals (metalloids), and nonmetals. There are several characteristics on which the target group is segmented. The chemical properties of Group 2 elements are dominated by the strong reducing power of the metals. The elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.. Compare this with the coloured compounds of most transition metals. 9.Explain, in terms of electron configuration, why the elements in Group 2 have similar chemical properties. Period A horizontal row in the periodic table. properties 24)At STP, both diamond and graphite are solids composed of carbon atoms. For a metal, alkali earth metals tend to have low melting points and low densities. ... With a two-sided positioning, both the functional product properties and the values or lifestyle are combined as position. Alkali Earth Metals – Group 2 Elements. You will find separate sections below covering the trends in atomic radius, first ionisation energy, electronegativity and physical properties. 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